3(r-90)=12

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Solution for 3(r-90)=12 equation: 



3(r-90)=12

We move all terms to the left:

3(r-90)-(12)=0

We multiply parentheses

3r-270-12=0

We add all the numbers together, and all the variables

3r-282=0

We move all terms containing r to the left, all other terms to the right

3r=282

r=282/3

r=94

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